Chibi Robo Park Patrol review at IGN.

"Usually when a game's an exclusive release to a particular retailer, it raises red flags. It's a good cause for alarm: did no store have enough faith in the product to purchase copies in significant number? Is it so terrible that the publisher felt that it would get more attention at a single retailer than simply as a normal release? The recent track records show us that "retailer exclusive" means "bad game": Sneakers for Xbox, The Settlers for Nintendo DS. Chibi Robo: Park Patrol has ended up as an exclusive release only available for purchase at Wal-Mart. That right there worried me. But you know what? It goes completely against the stigma laid by other exclusive releases: it's actually a good game. Oh, it's got its issues, but none so strong that it should dissuade you from checking out such a cute, clever, and casual Nintendo DS game design."

Full Source: IGN